SIST EN ISO 21068-3:2024
(Main)Chemical analysis of raw materials and refractory products containing silicon-carbide, silicon-nitride, silicon-oxynitride and sialon - Part 3: Determination of nitrogen, oxygen and metallic and oxidic constituents (ISO 21068-3:2024)
Chemical analysis of raw materials and refractory products containing silicon-carbide, silicon-nitride, silicon-oxynitride and sialon - Part 3: Determination of nitrogen, oxygen and metallic and oxidic constituents (ISO 21068-3:2024)
This part of ISO 21068 specifies analytical techniques for the determination of total nitrogen and nitrogen calculated as silicon nitride, total oxygen, and metallic and oxidic components in silicon carbide raw materials and refractory products.
Chemische Analyse von Rohstoffen und feuerfesten Erzeugnissen, die Siliziumcarbid, Siliziumnitrid, Siliziumoxynitrid und Sialon enthalten - Teil 3: Bestimmung des Gehaltes an Stickstoff, Sauerstoff sowie metallischen und oxidischen Bestandteilen (ISO 21068-3:2024)
Dieses Dokument legt Analysenverfahren für die Bestimmung von Gesamtstickstoff und als Siliciumnitrid berechnetem Stickstoff, Gesamtsauerstoff sowie metallischen und sauerstoffhaltigen Bestandteilen in Siliciumcarbid enthaltenden Rohstoffen und feuerfesten Erzeugnissen fest.
Analyse chimique des matières premières et des produits réfractaires contenant du carbure de silicium, du nitrure de silicium, de l’oxynitrure de silicium et du sialon - Partie 3: Dosage de l'azote, de l'oxygène et des constituants métalliques et oxydés (ISO 21068-3:2024)
Ce document spécifie des techniques analytiques permettant de doser l’azote total et l’azote calculés sous forme de nitrure de silicium, l’oxygène total et les composés métalliques et oxydés dans les matières premières et produits réfractaires de carbure de silicium.
Kemijska analiza surovin in ognjevzdržnih izdelkov, ki vsebujejo silicijev karbid, silicijev nitrid, silicijev oksinitrid in sialon - 3. del: Določevanje dušika, kisika ter kovinskih in oksidnih sestavin (ISO 21068-3:2024)
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Standards Content (Sample)
SLOVENSKI STANDARD
01-september-2024
Kemijska analiza surovin in ognjevzdržnih izdelkov, ki vsebujejo silicijev karbid,
silicijev nitrid, silicijev oksinitrid in sialon - 3. del: Določevanje dušika, kisika ter
kovinskih in oksidnih sestavin (ISO 21068-3:2024)
Chemical analysis of raw materials and refractory products containing silicon-carbide,
silicon-nitride, silicon-oxynitride and sialon - Part 3: Determination of nitrogen, oxygen
and metallic and oxidic constituents (ISO 21068-3:2024)
Chemische Analyse von Rohstoffen und feuerfesten Erzeugnissen, die Siliziumcarbid,
Siliziumnitrid, Siliziumoxynitrid und Sialon enthalten - Teil 3: Bestimmung des Gehaltes
an Stickstoff, Sauerstoff sowie metallischen und oxidischen Bestandteilen (ISO 21068-
3:2024)
Analyse chimique des matières premières et des produits réfractaires contenant du
carbure de silicium, du nitrure de silicium, de l’oxynitrure de silicium et du sialon - Partie
3: Dosage de l'azote, de l'oxygène et des constituants métalliques et oxydés (ISO 21068
-3:2024)
Ta slovenski standard je istoveten z: EN ISO 21068-3:2024
ICS:
71.040.40 Kemijska analiza Chemical analysis
81.080 Ognjevzdržni materiali Refractories
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN ISO 21068-3
EUROPEAN STANDARD
NORME EUROPÉENNE
June 2024
EUROPÄISCHE NORM
ICS 81.080 Supersedes EN ISO 21068-3:2008
English Version
Chemical analysis of raw materials and refractory
products containing silicon-carbide, silicon-nitride, silicon-
oxynitride and sialon - Part 3: Determination of nitrogen,
oxygen and metallic and oxidic constituents (ISO 21068-
3:2024)
Analyse chimique des matières premières et des Chemische Analyse von Rohstoffen und feuerfesten
produits réfractaires contenant du carbure de silicium, Erzeugnissen, die Siliziumcarbid, Siliziumnitrid,
du nitrure de silicium, de l'oxynitrure de silicium et du Siliziumoxynitrid und Sialon enthalten - Teil 3:
SiAlON - Partie 3: Dosage de l'azote, de l'oxygène et des Bestimmung des Gehaltes an Stickstoff, Sauerstoff
constituants métalliques et oxydés (ISO 21068-3:2024) sowie metallischen und oxidischen Bestandteilen (ISO
21068-3:2024)
This European Standard was approved by CEN on 25 May 2024.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2024 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 21068-3:2024 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
European foreword
This document (EN ISO 21068-3:2024) has been prepared by Technical Committee ISO/TC 33
"Refractories" in collaboration with Technical Committee CEN/TC 187 “Refractory products and
materials” the secretariat of which is held by BSI.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by December 2024, and conflicting national standards
shall be withdrawn at the latest by December 2024.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 21068-3:2008.
Any feedback and questions on this document should be directed to the users’ national standards
body/national committee. A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and the
United Kingdom.
Endorsement notice
The text of ISO 21068-3:2024 has been approved by CEN as EN ISO 21068-3:2024 without any
modification.
International
Standard
ISO 21068-3
Second edition
Chemical analysis of raw materials
2024-06
and refractory products containing
silicon-carbide, silicon-nitride,
silicon-oxynitride and sialon —
Part 3:
Determination of nitrogen, oxygen
and metallic and oxidic constituents
Analyse chimique des matières premières et des produits
réfractaires contenant du carbure de silicium, du nitrure de
silicium, de l’oxynitrure de silicium et du SiAlON —
Partie 3: Dosage de l'azote, de l'oxygène et des constituants
métalliques et oxydés
Reference number
ISO 21068-3:2024(en) © ISO 2024
ISO 21068-3:2024(en)
© ISO 2024
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii
ISO 21068-3:2024(en)
Contents Page
Foreword .v
Introduction .vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Determination of nitrogen and oxygen. 2
4.1 General .2
4.2 Combined determination of nitrogen and oxygen by an analyser with thermal
conductivity (TC) and infrared (IR) absorption detection .2
4.2.1 Principle .2
4.2.2 Reagents .3
4.2.3 Apparatus .3
4.2.4 Nickel pre-treatment .3
4.2.5 Calibration . . .4
4.2.6 Procedure .4
4.2.7 Precision .5
4.3 Determination of total nitrogen content by fusion decomposition .5
4.3.1 General .5
4.3.2 Principle .5
4.3.3 Reagents .5
4.3.4 Apparatus .5
4.3.5 Sample preparation .6
4.3.6 Procedure .6
4.3.7 Calculation and expression of results.7
4.3.8 Precision .8
4.4 Determination of total nitrogen content by Kjeldahl distillation .8
4.4.1 Principle .8
4.4.2 Reagents .8
4.4.3 Apparatus .9
4.4.4 Sample preparation .9
4.4.5 Procedure .9
4.4.6 Calculation and expression of results.10
4.4.7 Precision .10
4.5 Calculation of Si N content using total nitrogen content .10
3 4
4.5.1 Calculation .10
5 Determination of soluble iron by extraction with hydrochloric acid followed by
inductively coupled plasma-optical emission spectrometry (ICP-OES) .10
5.1 General .
...
SLOVENSKI STANDARD
oSIST prEN ISO 21068-3:2023
01-julij-2023
Nadomešča:
SIST EN ISO 21068-3:2008
Kemijska analiza surovin in ognjevzdržnih izdelkov, ki vsebujejo silicijev karbid,
silicijev nitrid, silicijev oksinitrid in sialon - 3. del: Določevanje dušika, kisika ter
kovinskih in oksidnih sestavin (ISO/DIS 21068-3:2023)
Chemical analysis of raw materials and refractory products containing silicon-carbide,
silicon-nitride, silicon-oxynitride and sialon - Part 3: Determination of nitrogen, oxygen
and metallic and oxidic constituents (ISO/DIS 21068-3:2023)
Chemische Analyse von Rohstoffen und feuerfesten Erzeugnissen, die Siliziumcarbid,
Siliziumnitrid, Siliziumoxynitrid und Sialon enthalten - Teil 3: Bestimmung des Gehaltes
an Stickstoff, Sauerstoff sowie metallischen und oxidischen Bestandteilen (ISO/DIS
21068-3:2023)
Analyse chimique des matières premières et des produits réfractaires contenant du
carbure de silicium, du nitrure de silicium, de l’oxynitrure de silicium et du sialon - Partie
3: Dosage de l'azote, de l'oxygène et des constituants métalliques et oxydés (ISO/DIS
21068-3:2023)
Ta slovenski standard je istoveten z: prEN ISO 21068-3
ICS:
71.040.40 Kemijska analiza Chemical analysis
81.080 Ognjevzdržni materiali Refractories
oSIST prEN ISO 21068-3:2023 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
oSIST prEN ISO 21068-3:2023
oSIST prEN ISO 21068-3:2023
DRAFT INTERNATIONAL STANDARD
ISO/DIS 21068-3
ISO/TC 33 Secretariat: BSI
Voting begins on: Voting terminates on:
2023-06-02 2023-08-25
Chemical analysis of raw materials and refractory products
containing silicon-carbide, silicon-nitride, silicon-
oxynitride and sialon —
Part 3:
Determination of nitrogen, oxygen and metallic and oxidic
constituents
ICS: 81.080
This document is circulated as received from the committee secretariat.
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENT AND APPROVAL. IT IS
ISO/CEN PARALLEL PROCESSING
THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
Reference number
NATIONAL REGULATIONS.
ISO/DIS 21068-3:2023(E)
RECIPIENTS OF THIS DRAFT ARE INVITED
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
PROVIDE SUPPORTING DOCUMENTATION. © ISO 2023
oSIST prEN ISO 21068-3:2023
DRAFT INTERNATIONAL STANDARD
ISO/DIS 21068-3
ISO/TC 33 Secretariat: BSI
Voting begins on: Voting terminates on:
Chemical analysis of raw materials and refractory products
containing silicon-carbide, silicon-nitride, silicon-
oxynitride and sialon —
Part 3:
Determination of nitrogen, oxygen and metallic and oxidic
constituents
ICS: 81.080
This document is circulated as received from the committee secretariat.
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENT AND APPROVAL. IT IS
© ISO 2023
ISO/CEN PARALLEL PROCESSING
THEREFORE SUBJECT TO CHANGE AND MAY
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
NOT BE REFERRED TO AS AN INTERNATIONAL
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on STANDARD UNTIL PUBLISHED AS SUCH.
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
IN ADDITION TO THEIR EVALUATION AS
or ISO’s member body in the country of the requester. BEING ACCEPTABLE FOR INDUSTRIAL,
TECHNOLOGICAL, COMMERCIAL AND
ISO copyright office
USER PURPOSES, DRAFT INTERNATIONAL
CP 401 • Ch. de Blandonnet 8
STANDARDS MAY ON OCCASION HAVE TO
BE CONSIDERED IN THE LIGHT OF THEIR
CH-1214 Vernier, Geneva
POTENTIAL TO BECOME STANDARDS TO
Phone: +41 22 749 01 11
WHICH REFERENCE MAY BE MADE IN
Reference number
Email: copyright@iso.org
NATIONAL REGULATIONS.
Website: www.iso.org ISO/DIS 21068-3:2023(E)
RECIPIENTS OF THIS DRAFT ARE INVITED
Published in Switzerland
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
ii
PROVIDE SUPPORTING DOCUMENTATION. © ISO 2023
oSIST prEN ISO 21068-3:2023
ISO/DIS 21068-3:2023(E)
Contents Page
Foreword .v
Introduction . vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Determination of nitrogen and oxygen. 2
4.1 General . 2
4.2 Combined determination of nitrogen and oxygen by an analyser with thermal
conductivity (TC) and infrared (IR) absorption detection . 2
4.2.1 Principle . 2
4.2.2 Reagents . 3
4.2.3 Apparatus . 3
4.2.4 Nickel pre-treatment . 3
4.2.5 Calibration . . . 4
4.2.6 Procedure . 4
4.2.7 Precision . 5
4.3 Determination of total nitrogen content by fusion decomposition . 5
4.3.1 General . 5
4.3.2 Principle . 5
4.3.3 Reagents . 5
4.3.4 Apparatus . 5
4.3.5 Sample preparation . 7
4.3.6 Procedure . 7
4.3.7 Calculation and expression of results. 7
4.3.8 Precision . 8
4.4 Determination of total nitrogen content by Kjeldahl distillation . 8
4.4.1 Principle . 8
4.4.2 Reagents . 8
4.4.3 Apparatus . 9
4.4.4 Sample preparation . 9
4.4.5 Procedure . 9
4.4.6 Calculation and expression of results. 10
4.4.7 Precision . 10
4.5 Calculation of Si N content using total nitrogen content . 10
3 4
4.5.1 Calculation . 10
5 Determination of soluble iron by extraction with hydrochloric acid followed by
Inductively Coupled Plasma-Optical Emission Spectrometry (ICP-OES) .11
5.1 General . 11
5.2 Scope . . 11
5.3 Principle . 11
5.4 Apparatus . 11
5.5 Reagents . 11
5.6 Sample preparation . 11
5.7 Procedure . 11
5.8 Measurement .12
5.9 Calculation .12
6 Determination of metallic (free) aluminium by the hydrogen generating method .12
6.1 Principle . 12
6.2 Reagents . 13
6.3 Apparatus . 13
6.4 Sample preparation .13
6.5 Procedure . 13
iii
oSIST prEN ISO 21068-3:2023
ISO/DIS 21068-3:2023(E)
6.6 Calculation and expression of results . 13
7 Determination of acid soluble aluminium and magne
...
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